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  本文選題：剪叉式機(jī)構(gòu) + 機(jī)動平臺��； 參考：《長沙理工大學(xué)》2012年碩士論文

【摘要】：剪叉式機(jī)構(gòu)是一類具有鮮明特色的平面連桿機(jī)構(gòu)，由于該機(jī)構(gòu)具有結(jié)構(gòu)簡單、伸縮性好、穩(wěn)定性強(qiáng)等優(yōu)良特性，因此在工程中得到了廣泛的應(yīng)用，特別應(yīng)用于升降平臺車、伸縮門、支撐架領(lǐng)域中。但由于剪叉式機(jī)構(gòu)缺乏系統(tǒng)的設(shè)計(jì)理論支持，設(shè)計(jì)者們難以去挖掘剪叉式機(jī)構(gòu)應(yīng)有的應(yīng)用潛力。 本論文對剪叉式機(jī)構(gòu)展開理論研究和探討，并將剪叉式機(jī)構(gòu)運(yùn)用到機(jī)動平臺領(lǐng)域。對原有的機(jī)動平臺進(jìn)行結(jié)構(gòu)的改進(jìn)，并針對該機(jī)動平臺進(jìn)行了承載能力的分析，并應(yīng)用有限元軟件對其進(jìn)行了優(yōu)化設(shè)計(jì)。主要進(jìn)行了以下研究工作： 研究剪叉式機(jī)構(gòu)不同組合形式，結(jié)合機(jī)動平臺的工作環(huán)境特點(diǎn)，對原有機(jī)動平臺進(jìn)行修改，加入剪叉式組合機(jī)構(gòu)，得到一種改進(jìn)后的空間展開式機(jī)動平臺。 對空間展開式機(jī)動平臺的主要受力構(gòu)件剪叉臂進(jìn)行承載能力分析�？紤]在實(shí)際情況下剪叉臂可能受到的載荷類型有壓力、彎矩、風(fēng)載荷，對剪叉臂在承受不同載荷類型下的強(qiáng)度、剛度以及穩(wěn)定性進(jìn)行計(jì)算分析，最后再對剪叉臂在承受多種載荷下綜合承載能力進(jìn)行計(jì)算分析。分析結(jié)果表明，在承受不同載荷情況下，剪叉臂的承載能力是足夠的。 利用ANSYS有限元分析軟件，對剪叉臂以及空間展開機(jī)構(gòu)受力情況進(jìn)行仿真，得到了剪叉臂和空間展開機(jī)構(gòu)的最大應(yīng)力、最大變形的大小以及位置，其分析結(jié)果也對前面的理論分析結(jié)果起到驗(yàn)證性的作用。 利用ANSYS強(qiáng)大的優(yōu)化功能，對空間展開式機(jī)動平的主要受力構(gòu)件進(jìn)行了結(jié)構(gòu)優(yōu)化，得到了優(yōu)化分析結(jié)果，大大減小了剪叉臂所承受的最大應(yīng)力，達(dá)到了優(yōu)化的目的。 通過改進(jìn)后的空間展開式機(jī)動平臺具有剪叉式機(jī)構(gòu)的優(yōu)良特性，，可廣泛運(yùn)用于戶外作業(yè)環(huán)境中去。
[Abstract]:The shear fork mechanism is a kind of planar linkage mechanism with distinct characteristics. Because of its simple structure, good flexibility and strong stability, it has been widely used in engineering, especially in lifting platform cars.Telescopic door, support in the field.However, due to the lack of systematic design theory support, it is difficult for designers to tap the application potential of the shear fork mechanism.In this paper, the shear fork mechanism is studied theoretically and applied to the field of mobile platform.The structure of the original mobile platform is improved, and the load-carrying capacity of the platform is analyzed, and the finite element software is used to optimize the design of the platform.The following studies were carried out:In this paper, the different combination forms of shear fork mechanism are studied. According to the working environment characteristics of the mobile platform, the original mobile platform is modified, and the shear fork type combination mechanism is added to obtain an improved spatial expansion maneuvering platform.The load-carrying capacity of the shear-fork arm, which is the main force member of the space expansion mobile platform, is analyzed.Considering the load types such as pressure, bending moment and wind load, the strength, stiffness and stability of the shear fork arm under different load types are calculated and analyzed.Finally, the comprehensive load-bearing capacity of the shear-fork arm under various loads is calculated and analyzed.The results show that the bearing capacity of the shear arm is sufficient under different loads.By using ANSYS finite element analysis software, the stress of the shear fork arm and the spatial expansion mechanism is simulated, and the maximum stress, the maximum deformation and the position of the shear fork arm and the spatial expansion mechanism are obtained.The analysis results also play a validating role to the previous theoretical analysis results.By using the powerful optimization function of ANSYS, the structural optimization of the main force components of the spatial expansion maneuvering plane is carried out, and the results of optimization analysis are obtained, which greatly reduce the maximum stress of the shear fork arm and achieve the purpose of optimization.The improved spatial expansion maneuvering platform has the excellent characteristics of shear fork mechanism and can be widely used in outdoor working environment.
【學(xué)位授予單位】：長沙理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2012
【分類號】：TH112

【引證文獻(xiàn)】

相關(guān)碩士學(xué)位論文 前3條

1 牛文歡;新型剪叉式高空作業(yè)平臺關(guān)鍵結(jié)構(gòu)設(shè)計(jì)研究[D];山東大學(xué);2013年

2 張志顯;40噸機(jī)場集裝箱/板升降平臺車設(shè)計(jì)研究[D];鄭州大學(xué);2013年

3 伍佳榮;曲線軌跡剪叉式機(jī)構(gòu)設(shè)計(jì)理論研究[D];長沙理工大學(xué);2013年

本文編號：1762221